<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
    <title>管理员系统</title>
    <style>
        body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
        .container { width: 90%; margin: 20px auto; }
        .menu { background-color: #f1f1f1; padding: 10px; margin-bottom: 20px; }
        .menu a { margin-right: 15px; text-decoration: none; }
        .content { padding: 20px; }
    </style>
</head>